Democratic U.S. Senate candidate Tammy Duckworth of Illinois hauled in $2.7 million during the second quarter as she tries to unseat Republican Sen. Mark Kirk, her campaign said Thursday.

Duckworth's campaign also said the two-term Hoffman Estates congresswoman had $5.5 million in the bank to start July.

Kirk campaign manager Kevin Artl said he did not have comparable information to release Thursday. The latest campaign-finance reports must be filed by July 15, and Duckworth's campaign released only highlights, not the full report.

Duckworth had to spend some money while easily winning the March primary, scoring 64 percent of the vote against two opponents. She had $4 million in the bank to start March, and her campaign said she raised $2.7 million from April through June and had $5.5 million left.

Kirk started April with $3.3 million on hand. While he's been raising money, he also has spent some of it to air TV ads this summer. Duckworth's central campaign theme has been to try to tie Kirk to controversial presumptive Republican presidential nominee Donald Trump. Kirk went up with a spot that touted him as someone who "bucked his party to say Donald Trump is not fit to be commander in chief."

Duckworth, an Iraq War veteran with a national political profile, has surpassed Kirk, a Navy Reserve officer who retired, in campaign fundraising in recent periods. Outside groups also are expected to heavily spend on the contest, where Kirk is viewed as one of the most vulnerable incumbent Republican senators seeking re-election.

In the 10th Congressional District, the campaign of Republican Rep. Bob Dold of Kenilworth said it took in more than $850,000 between April and June and started the month with more than $2.3 million.

Dold campaign spokeswoman Danielle Hagen said the full report has not been finalized and had no further details to release Thursday.

Democratic challenger Brad Schneider of Deerfield, who has won one and lost one against Dold, had $547,000 left after winning a March primary with nearly 54 percent of the vote.

Schneider spokeswoman Magen Ryan said the campaign was still working on its report and did not provide highlights.